Supporting plate for a display frame



FIG. 1 is a bottom perspective view of a supporting plate for a display frame showing my new design;

FIG. 2 is a front elevational view thereof

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a left side view thereof

FIG. 5 is a right side view thereof

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

CLAIM The ornamental design for a supporting plate for a display frame, as shown and described. 